Palpitations Question

First, a little background. I didn't realize I was T2 until after I went to the doctor for these palpitations. I would occasionally experience these maybe once every few months but we had a kid's birthday party in which they made this really good punch and I ended up having like 8 cups worth and almost died the next day from the stomach upset. A few days after that I started getting them more intensely. Thus the trip to the doctor (and the anxiety over my heart was giving me probably more problems!).

They feel like my heart sort of skips a beat and then SLAM back down with a lot of force. Sometimes I get many of them in the span of a few minutes and other times I don't get them much at all. I find that I get them most often when I lay down at night or when I've had something that causes a lot of gas and bloating.

I started Metformin a week ago and I've noticed that I'm getting more palpitations even during the day now. I'm just asking if anyone else has experienced this etc.

When I went to the doctor I got an ekg and it looked clean.